About The Cover

COVER Earth, from its innermost core to its outermost magnetosphere, is continually shaped by the highly interconnected array of forces that act on it. The subtle interplay of the fields and motions that are generated by and that generate these forces creates a planetary magnetic field, stirs the mantle, mixes the oceans and atmosphere, and modulates the solar wind. A special section starting on p. 1983 explores some of the dynamic systems that make Earth a true "terrestrial web." [Illustration: John Michael Yanson]